From: bernie Date: Tue, 12 Apr 2005 01:36:37 +0000 (+0000) Subject: Add hack to enable TX line at module initialization. X-Git-Tag: 1.0.0~836 X-Git-Url: https://codewiz.org/gitweb?a=commitdiff_plain;ds=sidebyside;h=24609d658e8c2c7795b8a5f8bef21512c020f1fb;p=bertos.git Add hack to enable TX line at module initialization. git-svn-id: https://src.develer.com/svnoss/bertos/trunk@405 38d2e660-2303-0410-9eaa-f027e97ec537 --- diff --git a/drv/kdebug.c b/drv/kdebug.c index d80be756..27e36511 100755 --- a/drv/kdebug.c +++ b/drv/kdebug.c @@ -15,6 +15,9 @@ /*#* *#* $Log$ + *#* Revision 1.24 2005/04/12 01:36:37 bernie + *#* Add hack to enable TX line at module initialization. + *#* *#* Revision 1.23 2005/04/11 19:10:27 bernie *#* Include top-level headers from cfg/ subdir. *#* @@ -67,9 +70,16 @@ /* * Support for special bus policies or external transceivers * on UART0 (to be overridden in "hw.h"). + * + * HACK: if we don't set TXEN, kdbg disables the transmitter + * after each output statement until the serial driver + * is initialized. These glitches confuse the debug + * terminal that ends up printing some trash. */ #ifndef KDBG_UART0_BUS_INIT - #define KDBG_UART0_BUS_INIT do {} while (0) + #define KDBG_UART0_BUS_INIT do { \ + UCSR0B = BV(TXEN); \ + } while (0) #endif #ifndef KDBG_UART0_BUS_RX #define KDBG_UART0_BUS_RX do {} while (0) @@ -123,9 +133,16 @@ /* * Support for special bus policies or external transceivers * on UART1 (to be overridden in "hw.h"). + * + * HACK: if we don't set TXEN, kdbg disables the transmitter + * after each output statement until the serial driver + * is initialized. These glitches confuse the debug + * terminal that ends up printing some trash. */ #ifndef KDBG_UART1_BUS_INIT - #define KDBG_UART1_BUS_INIT do {} while (0) + #define KDBG_UART1_BUS_INIT do { \ + UCSR1B = BV(TXEN); \ + } while (0) #endif #ifndef KDBG_UART1_BUS_RX #define KDBG_UART1_BUS_RX do {} while (0)